SO2) National Ambient Air Quality Standards (NAAQS
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Attachment 1 Indiana’s Preliminary Recommendations Concerning Round 3 Designations for the 2010 Primary 1-Hour Sulfur Dioxide (SO 2) National Ambient Air Quality Standards (NAAQS) This page left intentionally blank. Source County Boundary/Area Recommendation Duke Energy Gallagher Floyd County Attainment U.S. Mineral Products (Isolatek) Huntington See Attachment 3 See Attachment 3 NIPSCO R.M. Schahfer Jasper (P) Kankakee Township Attainment ArcelorMittal USA, Coke Energy, Calumet Township and Lake (P) Attainment U.S. Steel Gary Works North Township SABIC Innovative Plastics Posey (P) Black Township Attainment Hoosier Energy Merom Sullivan (P) Gill Township Attainment Eugene Township Duke Energy Cayuga Vermillion (P) Attainment Vermillion Township Alcoa Warrick Power Plant, Attainment Warrick (P) Anderson Township Alcoa Warrick Operations Plant See Attachment 4 (P) denotes partial county recommendation The following sources, though identified by U.S. EPA as being subject to the Data Requirements Rule, were addressed under Round 2 designations and designated by U.S. EPA on June 30, 2016 (81 FR 45039). Area Name Source Area County Name Designation Gibson County, IN Duke Gibson Gibson Unclassifiable/Attainment Jefferson County, IN IKEC Clifty Creek Jefferson (P) Unclassifiable/Attainment LaPorte County, IN NIPSCO Michigan City LaPorte Unclassifiable/Attainment Posey County, IN Vectren A.B. Brown Posey (P) Unclassifiable/Attainment Spencer County, IN AEP Rockport Spencer (P) Unclassifiable/Attainment Page 1 of 1 This page left intentionally blank. Attachment 2 Indiana’s Air Quality Modeling Technical Support Document Preliminary Designation Recommendations Data Requirements Rule (Round 3) 2010 Primary 1-Hour Sulfur Dioxide (SO 2) National Ambient Air Quality Standard (NAAQS) January 2017 Table of Contents 1.0 1-Hour SO 2 NAAQS and Designation Process ................................................................................. 1 2.0 Data Requirements Rule ................................................................................................................... 2 3.0 Methodology for DRR Air Quality Modeling .................................................................................. 4 4.0 Model Selection for DRR Modeling ................................................................................................. 5 4.1 AERMOD Dispersion Model ........................................................................................................ 5 4.2 AERMAP ...................................................................................................................................... 5 4.3 Land Use Determination ............................................................................................................... 5 5.0 Receptor Grid and Modeling Domain ............................................................................................... 5 6.0 Meteorology ...................................................................................................................................... 6 6.1 AERMET ...................................................................................................................................... 6 6.2 AERMINUTE/AERSURFACE .................................................................................................... 7 7.0 SO 2 Background Concentrations ....................................................................................................... 7 8.0 SO 2 Emissions Sources to be Modeled ............................................................................................. 8 8.1 DRR Sources ................................................................................................................................. 8 8.2 Inventory Sources ......................................................................................................................... 9 8.3 Intermittent Sources ...................................................................................................................... 9 9.0 Analysis of Modeling Results ......................................................................................................... 10 10.0 ArcelorMittal – Burns Harbor (Source ID 18-127-00001) ............................................................. 10 10.1 Source Description ...................................................................................................................... 10 10.2 Characterization of Modeled Area .............................................................................................. 10 10.3 Summary of DRR Monitoring Approach .................................................................................... 11 11.0 SABIC Innovative Plastics (Source ID 18-129-00002) .................................................................. 11 11.1 Source Description ...................................................................................................................... 11 11.2 Characterization of Modeled Area .............................................................................................. 12 11.3 Background Concentrations ........................................................................................................ 12 11.4 Modeling Methodology ............................................................................................................... 13 11.4.1 Model Selection .................................................................................................................. 13 11.4.2 Model Options .................................................................................................................... 13 i 11.4.3 AERMAP ............................................................................................................................ 14 11.5 Meteorological Data .................................................................................................................... 14 11.5.1 AERMET ............................................................................................................................ 14 11.5.2 Wind Rose ........................................................................................................................... 15 11.5.3 AERMINUTE/AERSURFACE .......................................................................................... 15 11.6 Receptor Grid and Modeling Domain ......................................................................................... 16 11.7 Stack Heights .............................................................................................................................. 17 11.8 Temporally Varying Seasonal 1-Hour SO 2 Background ............................................................ 17 11.9 SO 2 Emissions Included in the Modeling Analysis .................................................................... 18 11.9.1 DRR Source: SABIC Emissions ......................................................................................... 18 11.9.2 Inventoried SO 2 Sources Included in the Modeling ............................................................ 19 11.10 Modeling Results .................................................................................................................... 20 12.0 Lake County: Source IDs ArcelorMittal – USA (18-089-00316)/Cokenergy (18-089-00383)/U.S. Steel (18-089-00121) .................................................................................................................................. 22 12.1 Source Description ...................................................................................................................... 22 12.2 Characterization of Modeled Area .............................................................................................. 22 12.3 Background Concentrations ........................................................................................................ 23 12.4 Modeling Methodology ............................................................................................................... 24 12.4.1 Model Selection .................................................................................................................. 24 12.4.2 Model Options .................................................................................................................... 24 12.4.3 AERMAP ............................................................................................................................ 25 12.5 Meteorological Data .................................................................................................................... 25 12.5.1 AERMET ............................................................................................................................ 25 12.5.2 Wind Rose ........................................................................................................................... 26 12.5.3 AERMINUTE/AERSURFACE .......................................................................................... 26 12.6 Receptor Grid and Modeling Domain ......................................................................................... 27 12.7 Stack Heights .............................................................................................................................. 28 12.8 Temporally Varying Seasonal 1-Hour SO 2 Background ............................................................ 28 12.9 SO 2 Emissions Included in the Modeling Analysis ...................................................................